/Engine/Source/Runtime/SlateCore/Public/Layout/WidgetPath.h
A widget path is a vertical slice through the tree. The canonical form for widget paths is "leafmost last". The top-level window always resides at index 0. A widget path also contains a reference to a top-levelSWindowthat contains all the widgets in the path. The window is needed for its ability to determine its own geometry, from which the geometries of the rest of the widget can be determined.
class FWidgetPath
TSharedPtr<SWi...
TopLevelWindow
The top level window of this widget path.
FArrangedChildr...
Widgets
The widgets that make up the widget path, the first item is the root widget, the end is the widget this path was built for.